If 5 items cost Rs a then _______ items can be bought for Rs b.

Cost of 105 envelopes is Rs.35.How many envelopes can be bought for Rs.10?

15 stamps of equal value cost Rs.18.00.How many staps of the same value can be bought for Rs.36?

Find selling price (SP) if a profit of 5% is made on : a fan bought for Rs.560 and expenses of Rs.40 made on its repairs.

Refer to the graph given in fig. How much petrol can be bought for Rs.600?

A furniture dealer deals in only two items tables chairs. He has Rs 5000 to invest and a space to store at most 60 pieces. A table costs him Rs 250 and a chair Rs 50. He can sell a table at a profit of Rs 50 and a chair at a profit of Rs 15. Assuming that he can sell all the items that he buys, how should he invest his money in order that he may maximize his profit?

Find selling price (SP) if a profit of 5% is made on : a lawn mower bought at Rs.1150 with Rs. 50 as transporation charges.

Sohan bought a second hand refrigerator for Rs.2500,then spent Rs. 500 on its repairs and sold it for Rs. 3300 .Find his loss or gain percent .